Elevator control system



Nov. 29, 1932. E. GALE I 1,389,312

' ELEVATOR CONTROL SYSTEM Filed March 29. 1927 2 Sheets-Sheet 1 INVENTOR,FryresfL. Gale ATTORNE Nov. 29, 1932. v GALE 1,889,312-

ELEVATOR CONTROL SYSTEM Filed March 29. 1927 2 Sheets-Sheet 2,

.x'NvENToR finest L. Q ale ATTORNE Patented Nov. 29, 1932 UNITED STATESPATENT; OFFICE manner a. cannon YONKERS, NEW YORK, AssIGNon 'ro ennNnYELEVATOR COMPANY,

' INC., on NEW YORK, N. Y., A CORPORATION or PENNSYLVANIA ELEVATORCONTROL SYSTEM Application filed March 29, 1927. Serial No. 179,243.

' My invention relates to a push-button controlsystem for elevators,with circuits controlled by a movable or scale-beam platform.

In push-button control circuits for elevators, it is common practice toinclude a car gate switch in the operating circuit so that movement ofthe car cannot be effected by hall or car push-buttons until the cargate .is in closed position. But it frequently happens that the car gateis left open by the last passenger to leave the car, thus tying up thesystem as this prevents dispatch of the car from the hall push-buttons.

One of the objects of this invention is to provide an electro-magnetenergized by the hall button circuits for closing the car gate switch ora by-pass circuit around it, and to mechanically connect such magnetwith a movable car platform in such a way that any load on the platformwill render the magnet inoperative. Such an arrangement in eifectprovides means to control the switch in accordance with tell-talepositions of the platform, so that the magnet with the platformunoccupied and the car gate open, renders the system operable for hallbutton dispatch,

but with the platform occupied closure of the car gate is necessary torender the system operable for car button dispatch.

Another object of the invention is to provide an electro-magnet movableby the movable car platform to control multiple switches, one of whichcontrols a byass circuit around the car gate switch and t e other a carlight circuit to be opened when the car is unoccupied and not underdispatch,

but to be closed when the car is unoccupied and under dispatch by a hallbutton, so that the empty car will arrive lighted at itsdestination,'the car light switch having a delayed opening at such timeand being arranged to remain closed so long as the car is occupied.

'Another object of the invention is to provide non-interferencecontactors for a pushbutton system of circuits to be controlled bymechanism of a novel construction having new mode of operation.

A still further object of the invention is to provide push-buttoncontrolled circuits exelusive of the car gate switch and reversingswitch windings whereby operation of a car or hall button conditions thesystem to estabhsh direction for car travel and predetermines the stopwithout efi'ecting car move-' unoccupied.

Other objects of the invention will appear hereinafter, the novelcombinations of elements and arrangement of parts being pointed out inthe appended claims.

Referring to the accompanying drawings,

Fig. 1 illustrates in a more or less diagrammatic manner, a push-buttoncontrol system embodying the present invention; and

Figs. 2 to 4 inclusive illustrate alternative constructions and alsomodified systems of circuits.

In the drawings, C designates the elevator car, comprising in itsconstruction a platform D supported by scale-beam apparatus Eto havevertical movement to two different positions indicative of car platformcondition as to whether it is occupied or unoccupied. A car gate G maybe of any well known type adapted to be closed manually. Secured to thegate is a roller 4 to coact with the car gate switch or circuitcontroller H to close the same with the car gate in closed position byengaging a movable member such as the pivoted arm 1, and movement of thegate to open position disengages the roller from said armto permit thelatter to open the car gate switch.

Other elements which go tomake up the push-button control systemcomprise hall and car push-buttons designated h. Z2. and 0. 1)., floorrelays f. 1"., floor stop controlling mechanism f. 8., up and downdirection relays 8 and9 respectively, hoistway door contacts 12,non-interference switch 10, holding relay 11, and up and down reversingswitches in the form shown in Fig. 1, the car gate switch arm 1constitutes the armature for an electro-magnet K. The eleetro-magnet isconnected by a rod and lever connection 6 to the scale-beam lever 7, bywhich it is rotated bodily about a support 5. When the car platform isin unoccupied position, the electroanagnet K is in operative position asshown with respect to its armature or switch arm 1, so that whenenergized its magnetic lines are effective to actuate the switch arm toclose the car gate switch. ,lVith the car platform in occupied positionthe electromagnet is rotated into inoperative position so that itsmagnetic lines are ineffective to close the car gate switch.

In accordance with the present arrangement of circuits, the car gateswitch and the reversing switch windings are in a circuit exclusive ofthe push-button circuits, so that with the car at rest and all circuitsdead, all

the hoistway doors closed and the car gate in open position, any floorrelay other than the one corresponding to the landing at which the caris standing, can be set by button operation together with an up or adown direction relay, depending on car position and the button pressed.Thus the push-button system is conditioned to predetermine the car stopand establish direction for car movement, with the car gate open,without effecting car movement. This is so because the circuits for thereversing switch windings are exclusive of the push-button circuits andare controlled by the car gate switch also exclusive of the push-buttoncircuits, but dominated by the hoistway door contacts. Hence, with allhoistway doors closed, car movement is rendered effective by closing thecar gate switch to complete at that point an energizing circuit for anup or a down reversing switch winding in accordance with the directionrelay closed by button operation. The electr0-magnet K is energized byeither hall or car button operation and will be rendered effective bymovement of the car platform when unoccupied to close the car gateswitch or will be ineffective to close this switch if the car isoccupied. Therefore, the electro-magnet K is positioned by the platformposition to close the car gate switch only when the car platform is inunoccupied tell-tale position, to render car movement effective byhall-button operation even though the car gate be in open position.

Let us assume that the unoccupied car is at the third floor landing withthe car gate and car gate switch open and all the hoistway doors closed,and that the first floor hall button 20 is momentarily pressed. Bypressing this button a circuit is closed as follows: from a plus main21, through the hoistway door contacts 12 to wire 23, noninterferencerelay 10, wire 24, hall button 20 to wire 25, first floor relay winding19 to wire 26, floor controller s. to wire 27, winding 28 of the downdirection relay 9, wire 29, back contacts 30 of up direction switch 8,and thence by wire 31 to the minus line. The down relay 9 now operatesto close its contacts 13 in a circuit for the down reversing switchwinding 32 to establish direction for car travel. This reversing switchwinding circuit is exclusive of the floor relays and is dominated by thehoistway door contacts and the car gate switch, so that even though afioorrelay and direction relay may be set by hall button operation withthe car gate switch and car gate open, the hoisting operation is notrendered effective until the car gate switch and all the hoistway doorsare closed to complete an energizing circuit for the down reversingswitch winding 32. With the car platform unoccupied, the electromagnet Kassumes its operative position as illustrated, to which position it isshifted by being bodily rotated through the connection with the carplatform by the action of a balancing spring 17 which moves the platformupwardly as the last passenger steps there from. The electro-magnet K isincluded in the self-holding circuit 18 for the floor relays and will,therefore, become energized by operation of the first floor relay toclose its sclf-holding contacts 22. The electro-magnet K being energizedand in its operative position, will actuate the switch arm 1 to closethe car gate switch contacts H and thus complete the circuit for thedown reversing switch winding 32 to close the hoisting motor circuits(not shown) and start the car.

The completed circuit for the down reversing switch winding may betraced as follows: the same as heretofore traced up to a junction 33with the wire 23, wire 34, through car gate switch contacts H, wire 35,top contacts 13 of down direction relay 9, wire 36, down reversingswitch winding 32, and thence to the minus line by wire 37.

From the foregoing description it will be seen that movement of the carplatform shifts the electro-magnet K to two different telltale positionswhich are indicative of unoccupied and occupied car condition, and thatthis shifting of magnet position does not of itself affect the contactmechanism which is associated with the magnet.

A passenger first to occupy the car causes its platform to movedownwardly a limited distance to be seated against resilient stopmembers 78. This movement shifts the electro-magnet K bodily, byrotating it to an inoperative position with respect to the car gateswitch arm 1. Hence, with the car platform occupied, it becomesnecessary in order to render the hoisting operation efiective by carbutton operation, to close the car gate switch by closing the car gatein order to complete the circuit for a reversing switch winding.

From the detailed description already given for hall button operation,it will be to car movement while under carbutton or ball buttondispatch, this relay operating in Conjunction with the self-holdingrelay--11 for car button operation in a manner to prevent restoration ofthe hall button feed circuit when the car stops, unless and until. ahatch'way door has been opened and again closcd.-"- 4 -'In the Fig. 2illustration, the system of circuits is substantially the sameas in-Fig. 1

excepting that herein a switch 38 controls a by-pass circuit 39 aroundthe-car gate switch which is closed when the car platform-is unoccupiedto render the hoisting operation effeet-ire under such car conditionhall button control even if the car gate is in open position.- ThisIby-pass circuit is opened when the car-platform is occupied tonecessitate closure of the car gate to render the hoisting'operation'eitective byrcar button control.

The electro-ma gnet K in this instance is supported by averticallymovable guide rod -40 which-through-tell tale movement of thecar platform 'shi fts the electro magnet- K bodily in a straight linemovement with respect to its plunge 41 which is eonnected'to the switcharm 4-2. With suchan arrangement, when the platform is unoccupied themagnet is caused to shift by movement of the platform to decrease theair gap between the plunger'and the core 43 of the electro-magnet, sothat when the magnet is energized its magnetic lines are effective toactuate the plunger to close the by-pass switch 38. By closing theby-pass switch 38, the hoisting operation is rendered eifective by hallbutton-operation, with the car gate and car gate switch open and the carunoccupied, in the same manner as effected by closing the car gateswitch by the shiftahle magnet K in the Fig. 1 illustratron.

Movement of the car platform as effected by the first passenger to stepthereon shifts the electro-ma-gnet K to increase the air gap thehoisting operation effective by car button control, the car gate must beclosed to close the car gate switch.

In the Fig. 3 illustration, the circuits are substantially the same asin Fig. 2, the essential' di flerence residing in the provision of anelectro-im agnetically operable "by-pass switch 38 of a modifiedconstructionr In this modified construction, one ofthe contacts-of thebypass switch 38 is moved from an inoperativeosition indicated by dottedlines to anzoperative positionillustratcd in full. lines within range-ofits coacting contact. This movement effected by thezca-r latform doesnot close the switch, but p aces one contact in position to beengagedbyits coacting contact when the latter-is actuated byenergization of the .electro m-agne't K- and in such manner the by-passswitch is closed;

' It will thus be seen ltha-t'the ca-r platform shifts but :does notclose a contact by its movement when unoccupiedias by the last passengerstepping-therefrom, hut:closing of'the I-contacts isthen renderedeffective :by ener ization of the electro-anagnet K -'Hence, t 'e closedby-pass switch renders the. hoisting operation effective as controlledby ball :but-

-.ton operation with the car gaterand '1 the car gate switch open if thecar is unoccupied;

'Movement of the car. platform as effected by the first-passenger tostep thereon, shifts :the contact to the position indicated by dottedlines outof range of its .coacting contact when moved to actuatedposition-as effected by the electro-magnet' K"; The? by-pass switch isvmaintainedi'n such open-circuited position'so long as the car platform.is occupied, thus necessitating closure of the car gate to close the cargatefswitch to render the hoisting operation effective by car-buttoncontrol; 1 Y

In the arrangement shown .in- Fig. 4, "the electro-magnet K ispermanently energized and is shiftable bodily by movement of the carplatform so that for unoccupied condition of the latter theelectro-magnet assumes an operative position with respect to a switch51, magnetically to close same against the actionofa springfil toclose aby-pass circuit 62 around the car gate switch. The system .is

thereby rendered operable for dispatch-operation by the hall buttonswith the car platform unoccupied even with the roar gate and car gateswitch in open position. With the system of push-button control circuitsshown, the reversing switch windings are controlled directly by hall andcar button operation as in standard practice instead of indirectly .asby direction relays-as illustrated in the other figures. I

The hall button .feed circuit may be traced as follows: from a plus wire21, through hoistway doorcontacts'l2, wire '56 -to.a junction 57, theby-pass wire 62 and switch .51.to a junction 58, and from thereon to thehall push-buttons by way-of a wire 59 which innot under dispatch the carlight circuit 53'is opened at contacts .45 and. also" at contacts 46 ina-shunt circuit around the contacts 45. However, with the platformunoccupied and under dispatch .by a hall button, one of the contacts- 46i is shifted by "movement of the carplatform to a position within rangeof its=co actingcontactso that when the latter is in actuatedpositionias effected by energizationaof an electro-m'agnet 47 inthe-self-hold- Ethe shiftablecontact to close the car. light on cuit.Thus Ethe .ca-r light circuit 53 .is closed by hall button dispatchofthe fear, and the empty car will arrive lighted. The electromagnet 47 isde-energized when the car stops,

as bythe; automatic opening ofa floor relay, -but =thero'peningi of the.switch 46 is delayed by a dash-pot 49 insorder to maintain: the

ilightcircuit closed subsequently to car. stop,

a-sufiicient length oftime to enable a passen- 'ger--without delay toenterithe car. If the hall passenger should -not enter the car, it isevident that the light -circuit will be opened at theswitch46 atthe-expiration'of ashort period of time But if the hall passenger doesenter the car,'- his'act of stepping ont'o the car platform-moves theplatform, and by so doingshifts the electro-magnet"K downwardly to aninoperative'position with re spect "to the by-pass switch 51' and intooperl'ativeposition; with respect to'the switch arm 7 3. In suchshiftedpositi-on: of-the electro- :magnet it operates magnetically to.-instantaneouslyppen the hall button feed circuit 59 at thecontacts-44tothus-render the hell buttons inoperable as soon asand-while the car platform-is:occupied,and' at the same time closethe-contacts 45'to close the car light circuit at that point. In suchmanner the car light circuit is closed by a'second circuit controlledmagnetically by the electro-magnet K and indir ectly by movement of thecar platform-.- '1 3 Since by occupying the our platform it is moved toshift the electro-inagnet K to an inoperative position so that itsmagnetic lines are'rendered ineffective with respect to the switch 51,the latter will thereby be rendered operable to be opened by the spring61. Opening switch 51 opens the by-pass' circuit around the car gateswitch so that it becomes necessary to close the car gate to close thecar gate switch in order to close the car button feed wire 52 in orderto render the car buttons operable to dispatch the car.

It may be desirable'to. allow-a short time period to elapseafter thelast passenger steps off the car platform before restoration of the hallbutton-feed circuit at the contacts 44 is effected; To this end aclash-pot maybe provided for the switch arm-73. Or a dashpot (not shown)to retard the return movement of the car platform will accomplish thesame result. The magnet being movable'with the platform willmagnetically hold the contacts 45 closed during an appreciable movementof the electro-magnet -away from the switch arm73," and when suchmovement is suflicient to render the magnetic lines inefiective toattract arm 73, the spring '(7 will act to close the non-interferencecontacts 44 and open the car light circuit contacts 45. The

.ma'gnet K? .will then be-in' position to close the contacts 51. 9ingcircuit 48 of the'Zfloor-relays, it engages For hall button dispatchof the car, enerigization ofv the electro-magnet 47 actuates one of thecontacts 46 to engage its cooperating shiftable contact to close-the carlight circuit. Such engagement of the contacts 46 open-circuits backcontacts 50, both of which are shiftable bodily together with the magnetK and with one of the contacts 46. Said contacts 50 are in series withthe non-interferencecontacts44 in the feed circuit of the hallpush-buttons, and since the contacts 44 are .closed-with-the carplatform unoccupied,

they will not function to prevent interference to movement of the carwhile under hall button dispatch. 'However, for unoccupied carcondition, it will be seen that back contacts 50 are op'en-Circuited byenergization of the electro-magnet 47 when a floor relay closes itsself-holding circuit and thus interference to movement of car whileunder dispatch bv aha-ll button prevented. The dash-pot- 49,

=bydelaying the opening of the light circuit contacts 46, likewisewill'delay the closing of thenon-interference contacts 50, so that ahall passenger is given ample time to open thehoistway' door and occupythe car before restoration of the hall button feed circuit at contacts50.

I It will be seen that the electro-magnet provided herein. as in Fig. 1for example, conseen that the energization of the electro-magnet iscontrolled manually in both of its telltale positions but that it iseffective in only 'one of said positions magnetically to influence theswitch to control its closing and opening, and that when it is in itsinoperative or ineffective positions, as it is when anyone is in thecar, the gate switch can be closed only by closure of the car gate.

Having thus described the invention, what I claim is new and desire tosecure by Letters Patent of the United States is 1. A system of controlfor elevators comprising in combination, a car having a gate, acar gateswitch, closable when the car is occupied only by the car gate, andmagnetic switch; exclusive of;- said circuitsiand (Wu-- trolled to beclosed magnetically to etfect carmeans for closing said. switch withthe. car unoccupied. i p z 2. A system of control forelevatorscomprising in combination, a car having a gate, push-button controlcircuits, and acar gate dispatch. r

a car gate switch controlled thereby,- selectively operable ,hall pushbutton contaolled circuits,-andclectrmresponsive mean s con-. trolled.byssaid push buttons. to close said; switch and;therebyellectcardispatch. a 4. A. system of control tor elevators. com==' prising incombination, azcargate switch and anuallycontrolled.electigo-responsive,means to close the car gate switch.

5. A .system of; .control .ipr. elevators com prising incombinatio'n, acar. having agate,

a car, gate switch controlled. thereby,;- reversing s it he h s n t ng=wdm ,.s d; car; gate switch being-in, the circuit of said. 4 windings,and electroresponsive means-ar ranged to close said-car gate switch.

6. system of; control for elevators comprising in combinatioma car.having ,a gate, a

car gate switch. controlled thereby, selective ly operable. hall.,andmar push-button controlled circuits exclusive of said gate switch,

reversing switches having operative windings n a g a ici c it =..o t lby aidl gate switch. to, close .said reversing switches to eilect cardispatch, and electr c-responsive; means controlled by saidpush-buttomcircuits 5 g 3 3 her, a power device for actuating said mem- 7. .Asystem of controlior elevators com-- to ,closesaid cargate switch.-:...-

prising in combination, a carhayinga telltale movablezplatform, andanelectro-magclose the switch with the car occupied.

8. In combination, an elevator car having a, platform movableindependently'of the car frame, a power device movable b said platformmovement, and a member a apted to be actuated by said power device.

9. In combination, an elevatorcar having a platform movableindependently of the car frame, and a magnet having its air gapchangedby movement of said platform.

10. In combination, an elevator car having a platform movableindependently of the car frame, an electro-magnet having its air gapchanged by movement of said platform, and means to be influenced andnon-influenced by said electro-magnet, depending on such change of airgap.

11. In combination, an elevator car having a platform movableindependently of the car frame, a push-button system of controlcomprising an electro-magnetically operable noninterference switchmechanism, part of which is movable by said platform to render themagnetic efiect efi'ective to open-circuit said mechanism when theplatform is occupied.

12. In an elevator system, a weight responsive elementassociated with acar, arranged to assume different positions when p :5 the car isoccupiedorunoccupied a movable 3. A system of control.forelevatorseompris ngmcombination, aq-ar havmg agate,

member, means to control car operation, and a power devicc for themovable member controlled by said car control means and conditioned bysaid element to render the saiddevice eiiective or .inefiect-ive. tomove said member. I

13.; an elevator system, a weight responsive, .element associated with acar, arranged to assume, different positions when. the car is occupiedor unoccupied, a movable member, means for actuating said movable memberoperatively controlled by said element, and manually operable means forrenderingltheoperation of said actuating means effective to move saidmember.

, 14. In an elevator system, a weight 156 sponsive elementassociatedwith a car, .arranged to assume different positions when the car is,occupied-or unoccupied, a movable.

member, and a power device movable by said weight responsive elementtorender its influence efi 'ective to actuate said member when saidelement and said device are of theirpositions.

l5. ln an. elevator system, a weight responsive element associated. witha car, ar-

in only one ranged to assume dilferent positions when the vcarisoccnpied or unoccupied, a movablemember, manualmeans forcontrolling the energization thereof, said device being movable by saidelement to positions to render its in,- fluenceoperative or inoperative.v

.16. In .an elevator system, a weight responsive element associated witha car, arranged to assume difierent positions when the car is occupiedor unoccupied, a movable ed with and positioned by said element whenthelatter assumes one of such positions for efiectiveoperationindependently of said elementto close a circuit.

18. In an elevator system, a weight responsive element associated with acar, arrangedto assume different positions when the car is occupiedorunoccupied, a circuit controller, and means conditioned by such elemen;"for "effective s sh independently 1 of said "element upon said-circuitcontroller-. "'19. In "an" elevator system, a:- weight re sponsiv elelement" associated with star,- ar ranged to assume different positionsa when the carisoccupied or unocc'ii'pied, a circuit controller, andelectro-responsive means con: dition'e'di bysaid element, to therebyrender it operative to actuates'a'id circuit controller when sadele'ment assumes 'one'of its positioh'sf'l' I I 'JQOI'I'n an elevatorsystem, a weight responsive element associated "with *a car, arranged toassume different positions when the caris occupied or unoccupied;- acircuit controller,.and means positioned upon said element-assumingone'ot itspositions to actw (2;; In anti-avatar ystem, a weight re- 2.7-a, w 1,, sp nsiveelement associated with acar, ar-

ranged to assume different positions when the caris occupied orunoccupied, a circuit controller, e1ectro respoiisivemeans foractuoegapiea uiiocc' ipied, circuit controller,

and a p er (1 4 yic'e' foi' actuating the 'circ'l. controller a1rangedto bel e iiergized withsai elementin either trips positions, andbeing" movable by said element to'operative and inj operativepositions;

23. In an el evator's ystem, a weight responsive element associated witha car, arranged to assume different positions'when the car is '00-cupied or unoccupied", a circuit controller, a

power device for actuating the cir'cuit controller,. .'sai d deviceexerting its influence in both positionsot said element and beingmovable by sa d element to :POSItIOIIS' to render its 1nfiuence'effective when the element is in only one of its positions.

24. In an elevator system, a weight responsive element associated with acar, arranged to assume difl'erent positions when the car is occupied orunoccupied, a circuit controller, a powerdevice for actuating saidclrcuit controller movableiby said, element to, render its influence onthe circuit controller efiect'ive and inefiective, manual means toconnect said device with a source otpower supply, and my meansautomatically to disconnect said device rom th s e supp y v 25. In anelevator system, a weight responsive element associated with a ,car,arranged .toj have' a tell -tale, movement, and electromagneticallyoperable means on the car conate Zsaid circuit con'troller, and movedout or operative position upon theeiement assuming its other po's1t1on;I l

trolled-by said tell-tale movement of said element to render itsmagnetic effect operative and inoperative.

26'. In" an'elevatorsystem, a weight responsive-element associated witha car, arranged to 'have a' tell-tale movement, and anelectromagnetically operable device, part of which is movable todifferent positions by the tellta'le'mov'eme'nt of said element, one ofwhich renders the magnetic effect operative and the other inoperative.27. In an elevator system, a weight responsive element associated with acar, arranged to have a' tell-tale movement, and an electromagneticallyoperable device, part of which ismovable-to difierent postions by thetelltale-movement of said element, one of which renders'the magneticefiect effective to actuate another part of said device.

'28. In an elevator system, a weight responsive e1ement' associated witha car, arranged to ihave'a tell-tale movement, and a magnet movable bythe tell-tale movement ofsa-id element to operative and inoperativepositions? y 29. In an elevator system, a weight responsive elementassociatedwith a car, arranged to have a tell-tale movement, and amagnet having its "air gap changed in accordance with the tell-talemovement of said element. 7

-30 1mm elevator system, a weight responsiv'e" element associated with acar, arrang'dto have a tell-tale movement, an elec-' tro magnetfandarmature therefor, one of the twobeing movable independently of theother by the tell-tale movement of said element to change the air gap torender the electro-magnt {efi'ective and inefiective.

"3151a an elevator system, a weight responsive element associated with'acar, arranged to have a,te1l-talc movement, and an electro-magneticallyoperable switch, part of which is movable to different positions by thetell-tale movement of said element, one of which jrenders the magneticeflect effective to' closesaid switch, and the other of which rendersitineffective to close said switch.

32. In an elevator system, a weight responsive element associated with acar, arranged to have a tell-tale movement, a switch andan.electro-magnet, one of the two being movable to different positionsby the tell-tale movement of said element to render the energizedelectro-magnet operative and inoperative to close'the switch.

33. In an elevator system, a weightresponsive element associated with acar, arranged to have a tell-tale movement, a switch andanelectro-magnet to actuate said switch, movable to difierent positions bythe tell-tale movement of said element to render its magnetic efi'ecteffective and ineiiective.

' 34. In an elevator system, a weight responsive element associated witha car, ar-

ioo

(xiii spon'siyei elementa'ssociated with raiiged to have al-tel'l-tale'movement, a switch,

and an electro-magnet to actuate said switch, movable to' di'fierentpositionsby the tell-tale movement of's'aidelement td render its magnetic efieca-efieetive amr ineffective, and means-independent of themovement of said element fofctihtroilirig the energiaation 0f su-iemagnet."-- H f 35. In an elevator systems ranged whaveatelr-taleniove' twit'ch, an electro-magnevto tau-ta sel manual means tojel'oseaii I Ielectroqnagnetf ii ndnieans controlled automatically by the car to opensaid circuit.

36. In an elevator system, a weight responsive element associated with acar, ar-

ranged to have a tell-tale movement, a selectively operable push-buttonsystem of control, a movable member, and a power device to actuate samehaving its power supply controlled by said push-button system and itsinfluencing elfect controlled in accordance with the tell-tale positionof said element.

37. In an elevator system, a weight responsive element associated with acar, arranged to have a tell-tale movement, a selectively operablepush-button system of control, a circuit controller, and a power deviceto actuate same having its power supply controlled by said push-buttonsystem and its influencing effect controlled in accordance with thetell-tale position of said element.

38. In an elevator system, a weight responsive element associated with acar, arranged to have a tell-tale movement, selectively operable car andhall push-button system of control, a circuit controller and a powerdevice to actuate the same, having its source of power controlled bysaid push-button system, movable to different positions by the tell-taleposition of said element to render its influence effective andinefiective.

39. In an elevator system, a weight responsive element associated with acar, arranged to have a tell-tale movement, a selectively operablepush-button system of control, a circuit controller, and a power deviceto actuate same having its power supply controlled by said push-buttonsystem, and being movable by the tell-tale position of said element sothat with the car unoccupied it operates to both close and open saidcircuit controller, and with the car occupied its exerted influence isineffective to close Said circuit controller.

I dispatch without effecting such dispatch, and an electromagneticallyoperable switch conner'gizi'ng errata resend- T AVAILABLE com switch tocontrol dispatch of the car, part of said switch being movable by saidelement Y to render it effective to close the switch with movable"todifierentpositiefis by the tell-tale Y movement of said elementtorende'r' fitic fie t efi'ectiv nwineflectiv;

the car unoccupied.

- 42. In an elevator system, a weight re sponsive element associatedwith a car, arranged to have atell-talemovement, reversing switcheshaving operating windings, and an electro-magnetically operable switch'to control said reversing switch-winding circuits, part of which ismovable by'said element to. render it effective to close the switch withthe car unoccupied,-and inefi'ective to close the switch with the caroccupied.

43. In an elevator system, a weight responsive element associated with acar, arranged to have a'tell-tale movement, selectively operablepush-button controlled means, reversing switches having operatingwindings, and an electro-magnetically operable switch operable togetherwith said means to control said-reversing switch winding circuits, partof said switch being movable by said element to render it elie'ctive toclose the switch with the car unoccupied, and ineffective to close theswitchwith the car occupied.

-44. In-an elevator system, a weight responsiveelementassociated with acar, arranged to have a tell-tale movement, push-button controlledcircuits including non-interference contacts, and electro-responsivemeans to actuate said contacts, having an air .gap changed in accordancewith the movement of said element to render said device operative andinoperative.

&5. In an elevator system, a weight responsive element associated with acar, arranged to-have a tell-tale movement, said car having a gate, acar gate switch controlled by said gate, an electro-responsive actuatorfor said switch, and means controlled by the tell-tale movement of saidelement for rendering said actuator effective and ineffective.

4.6. In an elevator system, a weight responsive element associated witha car, arranged to have a tell-tale movement, said car having all)having'a gate, a car-gate switch controlled thereby, a push-buttonsystem of circuits con.- ditioned by operation of either a hall orcarbutton regardless of whether the car gate is open-or closed to establishdirection for car dispatch and predetermine its stop, car dispatch beingeffected by closing said gate switch, and an actuatorfor said gateswitch movable to different positions by. the telltale movement of saidelement to be effective and ineffective. T -i 48. In an elevator system,a Weight responsive element associated witha car, ar-. ranged-to have atell-tale movement, said car having agate, manually controlled means toestablish direction for car dispatch and predetermine its stopregardless of. whether the :car gate :is openior closed,:.withoutefwfecting car movement, a switch operable byclosing to effect 'car'movement, andmeans operable in accordance with thetell-tale po-: sitionof-said element to control said switchto close and open independently ofmovement ofsaidelement. f 49. Inan elevator system, aiweightresponsive'element associated with a car,'ar ranged to have atell-tale-movement, a car ate, manually controlled meansto establishdirection 'for car dispatch and to predetermine a stop withouteifecting- -car dispatch, a car gate switch arranged to be actuated bythe car gate, and an electro-magnetic actuator for said switch, a partof said actuator beingmovable bythe tell-tale movement' of said elementtowlrender it efl'ective5to=close the switchwvith' the car unoccupied-to efi'e ct L car dispatch, and to render it inefiectiveto clos theswitch with the car occupied. z '50; In an elevator system, aweightresponsive element associated with a car, ar ranged to have a tell-talemovement, said caihaving a gate, a switch, selectively operablepush-button controlled circuits exclusive of said switch, reversingswitches having operative windings and having a circuit controlled bysaid switch, and an electro-responsive device to actuatesaid switchmovable by the telltale movement of'said element to operative andinoperative positions.

51, In an elevator system, a weight responsive element associated with acar, arranged to have a tell-tale movement, a-car gate, a car gateswitch arranged to be actuated by the car gate, selectively operablepush-button controlled circuits exclusive of said switch, reversingswitches having operative windings and having a circuit controlled bysaid switch, and an 'electro-ma'gnet in said push-button controlledcircuits arranged to actuate said car gate switch, said magnet beingmovable to different positions by the tell-tale movement ofsaid'element, to be effective to close said gateswitch with-the carunoccupied and the cargate open, and to be ineifective'to influencesaidgate switch with the cart-unoccupied. v

52. :In ,an elevator. system, a weight responsive element associatedwith a car, arranged to have a tell-tale movement, a movable circuitcontroller on the car, and means

